按照有关法规规定,我国城乡基层的居民委员会和村民委员会每届任期为()。

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问题:

按照有关法规规定,我国城乡基层的居民委员会和村民委员会每届任期为()。

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题型:填空题

某5岁先天Ⅲ度腭裂患儿,于全麻下接 受腭裂修复术,为使发音和讲话接近正 常,术后应

A.进行语音训练

B.长期配戴腭护板

C.调整饮食习惯

D.正畸矫治错

E.局部理疗

题型:填空题

What do butterfly wings have to do with computer screens? What do birds have to do with high speed trains?

These may sound like strange things to put together. But scientists, inventors, and designers are doing just that. They are learning from nature to create new technology.

The word biomimicry (仿生学) combines two words: biology and mimicry. So people using biomimicry try to use examples in nature to design new technology.

Biomimicry is not a new idea. People have been studying nature for hundreds of years. Leonardo DaVinci used birds as models to invent his flying machine. And when the Wright Brothers made the first successful airplane, they also studied birds. In 998, Janine Benyus, a natural science writer and teacher, wrote a book about biomimicry. To develop her interest in the subject, Janine Benyus started the Biomimicry Institute.

The Biomimicry Institute is a non-profit organization. It brings together scientists, designers, inventors and many other people. It offers classes to teach people biomimicry. It provides money for people to research and test new technologies. And it wants all people, from children to adults, to think about new ways to learn from nature.

People involved with the Biomimicry Institute believe that biomimicry can help solve many of the world’s problems. Often, new technologies can harm nature, but this is not true for biomimicry. Let’s look at some examples.

Butterflies have colorful wings because light shines off them in a special way. Scientists want to copy these same ways to make light shine off computers. They hope this will make for more colorful screens.

Another example of biomimicry is the bullet train. It travels at speeds of over 250 kilometers per hour! But it had a problem: it made too much noise!

Through the observation of birds, scientists thought about a kind of bird, the kingfisher(翠鸟). The kingfisher can dive into water without making any noise because of the shape of its beak(喙). Researchers thought that if they could design the front of the train like this beak, the train would be quieter. Well, it worked!

小题1:The first paragraph is written to_____.

A.start a discussion

B.make a brief summary

C.introduce the topic of the text

D.test readers' knowledge on science小题2:Why did Janine Benyus set up the Biomimicry Institute?

A.To honor the Wright Brothers.

B.To show her recent inventions.

C.To gather talented people for her research.

D.To explore the link between nature and technologies.小题3:We know from the text that the Biomimicry Institute _____.

A.earns a lot by giving classes on biomimicry

B.tells people about their technologies

C.gives free support to scientists

D.teaches children about birds小题4:The author gives the two examples at the end of the text to show _______.

A.biomimcry works harmoniously with nature

B.the fast development of modern technology

C.how biomimcry changes our life

D.how nature inspires scientists小题5:What’s the main idea of the text?

A.Biomimicry is widely used in the world.

B.People copy nature to create new technologies.

C.The Biomimicry Institute was set up for science.

D.Birds play an important part in new technologies.

题型:填空题

在25℃时,100mL 0.4mol/L的盐酸与等体积0.6mol/L的氢氧化钠溶液混合后,溶液的pH值为(已知lg2=0.3)(  )

A.0.7

B.1

C.13

D.13.3

题型:填空题

下列哪一项不是五倍子的功效()

A.敛肺降火

B.涩肠止泻

C.收敛止汗

D.收敛止血

E.生津止渴

题型:填空题

城镇燃气供应场站的作用是()。

A.净化

B.储存

C.计量

D.加压或调压

E.加臭

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